//将变量绑定打印模板，执行动态渲染
export function bindVar(printTemplate, variable, domId) {
	const varExp = /\${\w+}/gi;
	//替换基础变量
	const printDom = document.getElementById(domId);
	printDom.innerHTML = printTemplate.replace(varExp, (mc) => {
		return variable[mc.substring(2, mc.length - 1).trim()] || mc;
	});
	const tableDoms = printDom.getElementsByTagName('table');
	//根据字段搜索所有表格，动态渲染表格
	for (let td of tableDoms) {
		//判断该表格存在于数据内
		if (Array.isArray(variable[td.className])) {
			const tbody = td.children[0];
			let tr = '';
			if (tbody.children.length === 1) {
				//可能是没有表头，就直接扫首行
				tr = tbody.children[0].outerHTML;
			} else {
				//按最后一行来处理
				tr = tbody.children[tbody.children.length - 1].outerHTML;
			}
			//判断有没有变量存在，没有就不处理
			if (varExp.test(tr)) {
				//行循环
				let tbHtml = '',
					thHtml = '';
				(variable[td.className] || []).forEach((row) => {
					tbHtml += tr.replace(varExp, (mc) => {
						return row[mc.substring(2, mc.length - 1).trim()] || mc;
					});
				});
				//取表头部分
				for (let i = 0; i < tbody.children.length - 1; i++) {
					thHtml += tbody.children[i].outerHTML;
				}
				tbody.outerHTML = thHtml + tbHtml;
			}
		}
	}
	printDom.innerHTML = printDom.innerHTML.replace(varExp, (mc) => {
		//没有值的字段用空代替，这里可以自己选择
		return '';
	});
}

export function getVal(formData, forms, val) {
	forms.forEach((item) => {
		//表单值，表单配置，要解析成的值
		decodeFieldVal(formData, item, val);
	});
}

function decodeFieldVal(formData, item, val) {
	let value = '';
	switch (item.name) {
		case 'SpanLayout':
			getVal(formData, item.props.items, val);
			break;
		case 'TableList':
			value = [];
			(formData[item.id] || []).forEach((row, i) => {
				value.push({});
				item.props.columns.forEach((col) => {
					decodeFieldVal(row, col, value[i]);
				});
			});
			break;
		case 'TimeRangePicker':
		case 'DateTimeRange':
			const v = formData[item.id];
			if (Array.isArray(v) && v.length > 1) {
				value = v[0] + ' ~ ' + v[1];
			}
			break;
		case 'DeptPicker':
		case 'UserPicker':
			value = String((formData[item.id] || []).map((v) => v.name));
			break;
		case 'MultipleSelect':
			value = String(formData[item.id]);
			break;
		case 'SignPanel':
			if (formData[item.id]) {
				value = `<img style="width: 150px; height: 100px; padding: 2px;" src="${formData[item.id]}"/>`;
			}
			break;
		case 'ImageUpload':
			formData[item.id].forEach((it) => {
				value += `<img style="width: 150px; height: 100px; padding: 2px;" src="${window.$vueApp.config.globalProperties.$getRes(it.url)}"/>`;
			});
			break;
		case 'FileUpload':
			value = String((formData[item.id] || []).map((v) => v.name));
			break;
		default:
			value = formData[item.id];
			break;
	}
	val[item.id] = value;
}

/* eslint-disable */
const Print = function (dom, options) {
	if (!(this instanceof Print)) return new Print(dom, options);

	this.options = this.extend(
		{
			noPrint: '.no-print',
		},
		options
	);

	if (typeof dom === 'string') {
		this.dom = document.querySelector(dom);
	} else {
		this.isDOM(dom);
		this.dom = this.isDOM(dom) ? dom : dom.$el;
	}

	this.init();
};
Print.prototype = {
	init: function () {
		var content = this.getStyle() + this.getHtml();
		this.writeIframe(content);
	},
	extend: function (obj, obj2) {
		for (var k in obj2) {
			obj[k] = obj2[k];
		}
		return obj;
	},

	getStyle: function () {
		var str = '',
			styles = document.querySelectorAll('style,link');
		for (var i = 0; i < styles.length; i++) {
			str += styles[i].outerHTML;
		}
		str += '<style>' + (this.options.noPrint ? this.options.noPrint : '.no-print') + '{display:none;}</style>';

		return str;
	},

	getHtml: function () {
		var inputs = document.querySelectorAll('input');
		var textareas = document.querySelectorAll('textarea');
		var selects = document.querySelectorAll('select');
		var canvass = document.querySelectorAll('canvas');
		for (var k = 0; k < inputs.length; k++) {
			if (inputs[k].type == 'checkbox' || inputs[k].type == 'radio') {
				if (inputs[k].checked == true) {
					inputs[k].setAttribute('checked', 'checked');
				} else {
					inputs[k].removeAttribute('checked');
				}
			} else if (inputs[k].type == 'text') {
				inputs[k].setAttribute('value', inputs[k].value);
			} else {
				inputs[k].setAttribute('value', inputs[k].value);
			}
		}

		for (var k2 = 0; k2 < textareas.length; k2++) {
			if (textareas[k2].type == 'textarea') {
				textareas[k2].innerHTML = textareas[k2].value;
			}
		}

		for (var k3 = 0; k3 < selects.length; k3++) {
			if (selects[k3].type == 'select-one') {
				var child = selects[k3].children;
				for (var i in child) {
					if (child[i].tagName == 'OPTION') {
						if (child[i].selected == true) {
							child[i].setAttribute('selected', 'selected');
						} else {
							child[i].removeAttribute('selected');
						}
					}
				}
			}
		}
		//打印canvas图像
		for (var k4 = 0; k4 < canvass.length; k4++) {
			var imageURL = canvass[k4].toDataURL('image/png');
			var img = document.createElement('img');
			img.src = imageURL;
			img.setAttribute('style', canvass[k4].getAttribute('style'));
			img.setAttribute('class', canvass[k4].getAttribute('class'));
			canvass[k4].style.display = 'none';
			canvass[k4].parentNode.insertBefore(img, canvass[k4].nextElementSibling);
		}
		// 包裹要打印的元素
		let outerHTML = this.dom.parentElement.innerHTML;
		//this.wrapperRefDom(this.dom).outerHTML
		return outerHTML;
	},
	// 向父级元素循环，包裹当前需要打印的元素
	// 防止根级别开头的 css 选择器不生效
	wrapperRefDom: function (refDom) {
		let prevDom = null;
		let currDom = refDom;
		// 判断当前元素是否在 body 中，不在文档中则直接返回该节点
		if (!this.isInBody(currDom)) return currDom;

		while (currDom) {
			if (prevDom) {
				let element = currDom.cloneNode(false);
				element.appendChild(prevDom);
				prevDom = element;
			} else {
				prevDom = currDom.cloneNode(true);
			}

			currDom = currDom.parentElement;
		}

		return prevDom;
	},

	writeIframe: function (content) {
		var w,
			doc,
			iframe = document.createElement('iframe'),
			f = document.body.appendChild(iframe);
		iframe.id = 'myIframe';
		iframe.style.width = '100vw';
		iframe.style.height = '100vh';
		w = f.contentWindow || f.contentDocument;
		doc = f.contentDocument || f.contentWindow.document;
		doc.open();
		doc.write(content);
		doc.close();
		var _this = this;
		iframe.onload = function () {
			_this.toPrint(w);
			setTimeout(function () {
				document.body.removeChild(iframe);
			}, 100);
		};
	},

	toPrint: function (frameWindow) {
		try {
			setTimeout(function () {
				frameWindow.focus();
				try {
					if (!frameWindow.document.execCommand('print', false, null)) {
						frameWindow.print();
					}
				} catch (e) {
					frameWindow.print();
				}
				frameWindow.close();
			}, 10);
		} catch (err) {
			console.log('err', err);
		}
	},
	// 检查一个元素是否是 body 元素的后代元素且非 body 元素本身
	isInBody: function (node) {
		return node === document.body ? false : document.body.contains(node);
	},
	isDOM:
		typeof HTMLElement === 'object'
			? function (obj) {
					return obj instanceof HTMLElement;
			  }
			: function (obj) {
					return obj && typeof obj === 'object' && obj.nodeType === 1 && typeof obj.nodeName === 'string';
			  },
};
export default Print;
